This was intended to power pacemakers and other implants, not our power grid.

I personally think this is overly complex and unnecessary (not to mention risky, I would think there is a danger of clotting). A couple years ago doctors figured out how to make a fuel-cell-like electrode that when placed in blood it would use the sugars naturally present there to generate a current.

Not only that, it's futureproofing the design of possible negative application. Screw the people that made this. Seems more detrimental to society rather than positive, but hey... It's all about the money.

Very cool idea, but I'd rather have advancements in batteries then sticking something mechanical inside my body to run a pacemaker, especially one this small. I wonder how much power this could create for athletes that regularly push their heart

Just what we need. Between Skynet and The Matrix, we don't need us inventing new ways of turning our bodies into batteries.

But seriously though, while the concept is valid and could be useful in certain applications, inserting something into the arteries could only IMO lead to clogging conditions and worsening the work load for the heart and cause more harm then good.

Im all for stressing machines to their MAX and tehn some, but when you do it to LIVING creatures its called slavery.....yes i am suggeting we will be enslaving our hearts and work them harder then they should.

It wouldnt be perpetual motion using the traditional law of thermodynamics... Your body still has to expend a lot of energy to generate the blood flow used to power this device... It is just taking it a step further and re-purposing the flow of blood to do something else in the process.